Are you asking how to build the stairs, the porch, or both?
Not knowing if you are replacing or making something new you would need to build forms first https://home.howstuffworks.com/home-improvement/how-to-build/how-to-build-forms-for-concrete-steps.htm
Then pour the cement https://www.concretenetwork.com/step-forms/how-to-pour.html
And that is assuming that you already have a porch in place.
Annette,. What do you mean???
What is it that you wan to do with your steps and porch? Repair? Decorate? Tile?